Guillermo Leoz-Callizo, MD
NPI 1528475845 · Psychiatry Physician · Houston, TX
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Guillermo Leoz-Callizo, MD is a Psychiatry Physician provider in Houston, TX (NPI 1528475845).
Provider details
- NPI number
- 1528475845
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- R7052 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 41 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 260 | 44 |
| Quetiapine Fumarate | 208 | 23 |
| Clonazepam | 207 | 28 |
| Escitalopram Oxalate | 157 | 32 |
| Aripiprazole | 146 | 26 |
| Duloxetine Hcl | 129 | 21 |
| Sertraline Hcl |
Practice location
Mailing address
Additional practice locations (2)
- 4301 Garth RdSte 302, 306, & 400Baytown, TX 77521-3153Phone: (832) 548-5000Fax: (281) 420-8445
- 400 N Beach St Ste 104Fort Worth, TX 76111-7070Phone: (817) 831-1750
Registry dates
- Enumerated
- 2014-07-18
- Last updated
- 2026-02-19
- Certified
- 2026-02-19
Frequently asked questions
- What is Guillermo Leoz-Callizo's NPI number?
- Guillermo Leoz-Callizo's National Provider Identifier (NPI) is 1528475845, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Guillermo Leoz-Callizo's specialty?
- Guillermo Leoz-Callizo is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Guillermo Leoz-Callizo located?
- Guillermo Leoz-Callizo's practice location on file with NPPES is 1415 California St, Houston, TX 77006-2602.
- What is Guillermo Leoz-Callizo's phone number?
- The practice phone number listed in the NPPES registry for Guillermo Leoz-Callizo is (832) 548-5000.
- Does Guillermo Leoz-Callizo accept Medicare?
- Guillermo Leoz-Callizo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Guillermo Leoz-Callizo's NPI active?
- Yes — Guillermo Leoz-Callizo's NPI (1528475845) is active in the NPPES registry as of the last update on 2026-02-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.